. >>> starting tomorrow first lady michelle obama will be campaigning for her husband making appearances in richmond and the university of mary washington in fredericksburg. mitt romney arrived at dulles international airport this afternoon. tomorrow he is set to hold a rally ativan dike park in fairfax. that is -- at van dyke park in fairfax. that is slighted to start around 11:30. >>> a health alert tonight that's showing promise to treat people with certain hearing disorders. scientists at university of california say they're improving the hearing of deaf animals through the use of embryonic stem cells. the work was done on gerbils and targeted the nerve cells that transfer the information from the ear to the brain. >>> we also have a consumer alert tonight about some cheese tainted with listeria. the centers for disease control and protest linked ricotta cheese to 14 -- cdd linked ricotta cheese to 14 imens sold between june 20th and august 9th, most of it used by restaurants or broken down into smaller servings or packages. so you may not even know if you bought it. so the cdc says